Structural Variation and Its Influence on the 1/f Noise of a-Si_(1-x)Ru_x Thin Films Embedded with Nanocrystals

The structural variation and its influence on the 1/f noise of a-Si_(1-x)Ru_x thin films are investigated by Raman spectroscopy,transmission electron microscopy, and low frequency noise measurement. The Ru atoms are introduced into the amorphous silicon thin films by rf magnetron co-sputtering. Ru2 Si nanocrystals are found in the as-deposited samples. It is shown that the 1/f noise of the films can be reduced by a slight doping with Ru atoms. Moreover, both the microstructure and the 1/f noise performance of a-Si_(1-x)Ru_x thin films could be improved through a high-temperature annealing treatment.     

Effects of Rapid Recurrent Thermal Annealing on Giant Magnetoresistance NiFe／Ag Multilayers

NiFe/Ag multilayers were prepared by dc sputtering onto glass-ceramic substrates directly at room temperature. The samples were thermally processed by rapid recurrent thermal anneal (RRTA). We studied the effects of RRTA on giant magnetoresistance (GMR) NiFe/Ag multilayer by contro11ing the anneal temperature as well as the rapid anneal cycle. The samples after three RRTA cycles have a similar annealing temperature dependence of GMR responses to the ordinary annealed samples. With the increasing anneal cycle, the GMR response improved at first and then reached an unexpected high value of 9% before descent rapidly. Microstructure study shows that this effect is ascribed to the transformation of continuous NiFe layer into discontinuous one, and then into a granular like film in a step-by-step way.     

激光高反射膜的研究

研究混合膜（TiO2 Ta2O3;Ta2O5 ZrO2)的色散规律，用Ta2O5 ZrO2和SiO2成功地镀制出两个波段（632．8nm,1.06μm)的激光反射膜，使激光破坏阈值提高5％－15％（1．06μm)，膜层吸收小，机械强度增加。     

激光反射镜与诱导透射滤光片工艺分析

随着光通信和光信息技术的迅速发展,介质高反射镜和窄带滤光片倍受人们关注,有机光学薄膜滤波器材料及器件将日益受到重视.采用一个低通滤波器和高通滤波器在其通带叠合处便可产生一个优良的窄带滤波器.详细介绍了几种光学薄膜器件激光反射镜、诱导透射滤光片(ITF)和微片式激光器的混合材料及制备工艺,并给出其设计方法,对批量生产将有极大的促进作用.     

Effects of Layer Deposition Sequence on Microstructure and Magnetostatic Coupling of Spin-Valves with Amorphous CoNbZr Layer

We investigate spin-valve sandwiches with thin amorphous CoNbZr as soft layers. The magnetoresistance (MR), microstructure, and magnetostatic coupling are studied in these sandwiches with different layer deposition sequences. For the CoNbZr/Cu/Co sandwich, the CoNbZr underlayer provides a smoother surface on which smooth Cu and Co layers can subsequently grow. The Cu spacer is dense and pinholes-free, leading to a good ““spin valve““ effect with a larger MR ratio of 3.8%. For the Co/Cu/CoNbZr sandwich, however, the Cu spacer is rough and pinholes were observed, which could induce a direct ferromagnetic coupling. Correlated rougher surfaces on both the sides of the Cu spacer were also observed, giving rise to an ““orangepeel““ coupling of about O. 105 erg/cm^-2. This strong ferromagnetic coupling in Co/Cu/CoNbZr results in a lower MR ratio of 1.6%. Moreover, upon proper thermal annealing, the CoNbZr/Cu/Co has a larger MR enhancement and a superior thermal stability to 350℃ due to the dense and homogenous structure in the spacer layer.     

透明导电半导体ZnO膜的研究

本文采用独特的电子束蒸镀方法，在光学镀膜机上，以 ＺｎＯ＋３％Ａｌ２Ｏ３和 ＺｎＯ为膜料．ｋ９光学玻璃为衬底，制备出ＺｎＯ 膜。膜层为多晶膜，可见光透过率为Ｔ＝７０－９０％，电阻率ｐ＝１×１０－５Ω·ｍ，方电阻为 Ｒ　＝１５０±５０±５０Ω／　，膜机械强度超过国标单层标准，找到实用最佳工艺条件。